#!/bin/bash


s1_goto_dir(){

   cd "$1"

}

s2_touch_empty_file_with_given_name(){

   touch "$1"

}

s3_make_directories(){

   mkdir -p projects/{git,backup}

}

s4_create_6_files(){
    touch projects/{linux1_,linux2_}{centos,redhat,c_programming}
}

s5_make_directories_in_git(){
   mkdir -p projects/git/{linux1,linux2}
}

s6_move_files_to_dir_1_or_2(){
    
   mv projects/*linux1_* projects/git/linux1/
   mv projects/*linux2_* projects/git/linux2/
}

s7_create_package_and_compress(){
   tar -czvf projects/backup/git.tar.gz -C ~/projects git/

}

s8_delete_dir_git(){
   rm -rf ~/projects/git

}

s9_recover_from_git_tar_gz_backup(){
   tar -zxvf projects/backup/git.tar.gz -C projects/

}

s10_create_package_and_compress(){
   tar -jcvf projects/backup/git.tar.bz2 -C ~/projects git/
}

s11_find_and_sort_alphabetically_all_created_files_and_dirs(){

    find ./projects -type f -o -type d | sort -n

}

s12_get_next_15_minutes_boundary(){
     now=$(date '+%s')
     next=$(((now + 900) / 900 * 900))
     next_quarter_hour=$(date -d "@$next"  '+%Y-%m-%d_%H:%M:%S')
     echo $next_quarter_hour

}
